Delta is a distinctive girls' name in United States, ranking #12466 in 2011 with 8 recorded births. The name reached its all-time peak in 2019 with 136 births ranking #1571. Since 1996, the popularity has decreased by 50.0%. In 2011, approximately 1 in every 219,851 girls born was named Delta. FALLING Recent data shows the name is currently falling.